Printers

ABSTRACT

Fluid couplings examples are disclosed in examples herein. An example printer includes a housing; and a fluid reservoir permanently fixed within the housing, the fluid reservoir having a capacity sufficient to store enough ink to print a number of pages that corresponds to an expected useful life of the printer.

RELATED APPLICATION

This application arises from a continuation of U.S. patent applicationSer. No. 14/374,897, which was filed on Jul. 26, 2014, which is anational stage of PCT Application Serial No. PCT/US2012/034089, whichwas filed on Apr. 18, 2012. Priority is claimed to U.S. application Ser.No. 14/374,897 and PCT Application Serial No. PCT/US2012/034089. U.S.patent application Ser. No. 14/374,897 and PCT Application Serial No.PCT/US2012/034089 are hereby incorporated by reference in theirentireties.

BACKGROUND

Examples of fluid delivery systems include fluid supplies, regulatorsfor regulating fluid flow and/or back pressure, and fluid dispensingheads. A fluid delivery system may be part of a wider system, forexample a print system. Regulators may be provided in a fluid supply,near a fluid dispensing head or at any other suitable location in thefluid delivery system. Exchangeable or non-exchangeable fluid suppliesmay be provided for delivering the fluid to the fluid dispensing heads.In some systems the fluid supplies include a reservoir and a regulator.In other systems, separate reservoirs are connected to the fluidsupplies. Such separate reservoirs can be connected to the respectivefluid supplies through fluid delivery tubes, for replenishing thesupplies.

Continuous ink supply systems include one or more separate inkreservoirs connected to ink supplies, for continuously replenishing theink supplies with ink out of the reservoir. In other systems, such asscanning printhead systems, regulator supplies may be provided on ascanning carriage and the ink reservoirs are included in separateexchangeable ink cartridges. Regulator supplies may be connected todistant reservoirs through flexible tubes. The distant reservoirsdeliver the fluid to the regulator supplies and printheads while thecarriage scans. In some of these fluid delivery systems it ischallenging to establish reliable fluidic couplings.

BRIEF DESCRIPTION OF THE DRAWINGS

For the purpose of illustration, certain examples constructed inaccordance with the teachings of this disclosure will now be describedwith reference to the accompanying drawings, in which:

FIG. 1 illustrates a diagram of an example of a fluid coupling;

FIG. 2 illustrates a diagram of an example of a print system including afluid coupling;

FIG. 3 illustrates a diagram of an example of a kit for assembling afluid coupling;

FIG. 4 illustrates a perspective view on another example of a fluidcoupling;

FIG. 5 illustrates a perspective view on a portion of the example fluidcoupling of FIG. 4;

FIG. 6 illustrates a perspective, partially explosive view on theexample fluid coupling of FIGS. 4 and 5;

FIG. 7 illustrates a perspective, partially explosive view on anotherportion of the example fluid coupling of FIGS. 4-6;

FIG. 8 illustrates a different perspective, explosive view on againdifferent portions of the example fluid coupling of FIGS. 4-7

FIG. 9 illustrates another perspective, explosive view of the portionsof FIG. 8;

FIG. 10 illustrates a perspective view on a bottom of a tube tray of theexample fluid coupling of FIGS. 4-9;

FIG. 11 illustrates a perspective view on different portions of theexample fluid coupling of FIGS. 4-10, the portions being partiallydisassembled;

FIG. 12 illustrates a different perspective view of the portions of FIG.11, in assembled condition;

FIG. 13 illustrates a flow chart of an example of a method ofestablishing a fluidic connection;

FIG. 14 illustrates a flow chart of another example of a method ofestablishing a fluidic connection

FIG. 15 illustrates a flow chart of a portion of another example of amethod of establishing a fluidic connection; and

FIG. 16 illustrates a flow chart of a portion of another example of amethod of establishing a fluidic connection.

DETAILED DESCRIPTION

In the following detailed description, reference is made to theaccompanying drawings. The examples in the description and drawingsshould be considered illustrative and are not to be considered aslimiting to the specific example or element described. Multiple examplesmay be derived from the following description and/or drawings throughmodification, combination or variation of certain elements. Furthermore,it may be understood that examples or elements that are not literallydescribed may be derived from the description and drawings by a personof ordinary skill in the art.

FIG. 1 illustrates an example of a fluid coupling 1 in assembledcondition. As illustrated, the fluid coupling 1 can be connected to afluid reservoir 3 and a fluid supply 2. The fluid coupling 1 is arrangedto establish a fluidic connection between the fluid reservoir 3 and thefluid supply 2. The fluid coupling 1 includes a fluid delivery tube 4for delivering fluid from the reservoir 3 to the supply 2. The fluidcoupling 1 includes a fluid interconnect fitting 5 that is connected tothe fluid delivery tube 4. The fluid interconnect fitting 5 is arrangedto fluidically connect the fluid delivery tube 4 to the fluid supply 2.In assembled condition and in operation, fluid flows through the fluidinterconnect fitting 5. For example, within the fluid interconnectfitting 5 fluid is redirected over an angle α of between 60 to 120degrees, as indicated by fluid flow arrow F. In the illustrated example,the fluid flow F changes direction over an angle α of approximately 90degrees. The fluid coupling 1 includes a retainer 6 that is arranged toengage the fluid interconnect fitting 5 and the fluid supply 2, forretaining the fluid interconnect fitting 5 with respect to the fluidsupply 2. The fluid coupling 1 includes a seal feature 7 for sealing aconnection between the fitting 5 and the supply 2. The seal feature 7 isarranged to mate with the fluid interconnect fitting 5. The seal feature7 has an outer surface that is arranged to be inserted in a fluid inlet8 of the fluid supply 2. In one example, the fluid inlet 8 is anintegral part of the fluid supply 2, for example provided when moldingthe supply 2. In another example, the fluid inlet 8 is provided bydrilling or otherwise providing a hole in the supply 2 after molding thesupply 2.

As illustrated by the example of FIG. 2, the fluid supply 2 can be areplaceable or fixed part of a fluid delivery system 9 or print system100. In this disclosure, the fluid delivery system 9 may be understoodas including the fluid coupling 1, the fluid supplies 2 and/or the fluidreservoir 3. For example, the fluid delivery system 9 is part of a printsystem 100. In operation, the fluid reservoir 3 replenishes the fluidsupply 2 with fluid through said fluid coupling 1. For example, thefluid supply 2 supplies the fluid to a fluid dispensing head orprinthead. In an example, the fluid includes ink. In a further example,the fluid supply 2 includes a regulator 13 for regulating the fluidpressure.

For example, the print system 100 includes the fluid reservoir 3, thefluid coupling 1, the fluid supply 2 and a fluid dispensing head 15. Forexample, the fluid supply 2 includes the fluid inlet 8. For example thefluid inlet 8 is fluidically connected to the fluid delivery tube 4, forexample through the fluid interconnect fitting 5 and seal feature 7. Inthe illustrated example, the fluid supply 2 includes a regulator 13 forregulating a fluid pressure. For example, the regulator 13 includes atleast one of a capillary medium and a flexible membrane. The flexiblemembrane for example includes a bag or flexible wall wherein a backpressure is established with the aid of a resilient or tensions elementsuch as a leaf spring or other type of spring. For example, the fluidsupply 2 includes a fluid outlet 14 for fluidic connection to the fluiddispensing head 15, through further fluid delivery tubes 16. Forexample, the fluid dispensing head 15 includes fluid ejectors, forexample at least one of thermal and piezo actuators. For example, thefluid includes ink.

FIG. 3 illustrates an example of a kit of parts 10 for assembling afluid coupling 1 for connecting the fluid supply 2 to the fluidreservoir 3. In FIG. 3 the example kit of parts 10 is represented in adisassembled condition. The kit of parts 10 includes the fluid deliverytube 4 for connection to the fluid reservoir 3. The kit of parts 10includes the fluid interconnect fitting 5 for connection to the fluiddelivery tube 4 and the fluid supply 2. A cross section of the fluidinterconnect fitting 5 is illustrated, illustrating an internal fluidchannel 11 of the fluid interconnect fitting 5 that makes an angle α ofbetween 60 to 120 degrees, in the illustrated example approximately 90degrees. In an example (not illustrated), the internal channel 11 makesa rounded curve over 60 to 120 degrees, instead of a sharp angle asillustrated in the figure. The kit of parts includes a retainer 6 thatis arranged to engage the fluid interconnect fitting 5 and the fluidsupply 2, for retaining the fluid interconnect fitting 5 with respect tothe fluid supply 2. For example, the retainer 6 is defined by aclip-like feature for clipping it to the fluid interconnect fitting 5and fluid supply 2. Furthermore, the kit of parts 10 includes the sealfeature 7 that is arranged to connect to the fluid interconnect fitting5 and the fluid inlet 8 of the fluid supply 2. In a further example, thekit of parts 10 includes a set of instructions 12 for assembling theparts 2, 3, 4, 5, 6, 7 together so as to establish the fluid coupling 1and provide for a working fluid delivery system 9. In one example, theset of instructions 12 is defined by a human readable set ofinstructions to allow a to person to assemble the kit of parts 10. Inanother example, the set of instructions 12 is defined by a computerreadable memory including machine readable instructions. For example thekit of parts 10 includes at least the fluid delivery tube 4, the sealfeature 7, the fluid interconnect fitting 5, the retainer 6 andsub-features thereof.

In one example, the fluid reservoir 3 can hold a relatively large volumeof fluid while the fluid supply 2 may act as a regulator 13 forproviding fluid to a further fluid dispenser such as a printhead orother type of fluid ejector. The fluid coupling 1, or kit of parts 10thereof, may allow for a relatively easy at least substantially liquidor gas tight fluidic coupling between the fluid supply 2 and the fluidreservoir 3. For example, the fluid coupling 1 facilitates a relativelyeasy fluidic coupling between at least one fluid reservoir 3 and atleast one corresponding fluid supply 2, that can be established manuallyand/or by machine.

FIGS. 4, 5 and 6 illustrate different views on another example of afluid coupling 1 and multiple corresponding fluid supplies and/orexchangeable ink cartridges 2A-2D, wherein FIG. 7 illustrates an examplefluid coupling 1 without supplies 2A-2D. As illustrated in FIG. 4, in anexample, the fluid coupling 1 includes a tube tray and/or receptacle 20that is mounted on top of the fluid supplies 2A-2D. For example, thesupplies 2A-2D are existing supplies provided with adaptations forfacilitating the fluid coupling 1. For example, the tube tray 20 isarranged to guide and bundle fluid delivery tubes 4A-4D to the fluidinlets 8A-8D of the respective fluid supplies 2A-2D. For example, thetube tray 20 is defined by a single cast, that is, an integrally moldedplastic part. For example, the tube tray 20 is provided with retainingfingers 21 or the like to aid in bundling and retaining the fluiddelivery tubes 4A-4D. For example, a separate bundling sleeve 69 isprovided to aid in bundling the fluid delivery tubes 4A-4D. For example,the tube tray 20 is arranged to change a direction of the fluid deliverytubes 4A-4D over an angle of at least approximately 90°, for examplebetween 90° and 180°. As illustrated, the fluid delivery tubes 4A-4D areredirected over a curve towards the fluid inlets 8A-8D. For example, thetube tray 20 includes a curved standing wall 22 arranged to aid inbending and guiding the fluid delivery tubes 4A-4D along said curve. Forexample, the curved standing wall 22 is also arranged to protect thefluid delivery tubes 4A-4D. In an example, the standing wall 22 curvesover an angle of at least approximately 90°.

In an example the fluid coupling 1 includes one fluid delivery tube4A-4D for each of four colored supplies 2A-2D for delivering each of C,M, Y, K colors to the respective supplies 2A-2D. In an example, eachfluid delivery tube 4A-4D terminates in the corresponding fluidinterconnect fitting 5A-5D. For example, an end of the fluid deliverytube 4A-4D may extend within the fitting 5A-5D and may be fixed to thefitting 5A-5D, so that in operation fluid can flow from the tube 4A-4Dto the inner channel 11 (diagrammatically illustrated in FIG. 3) of thefitting 5A-5D. For example, the fluid interconnect fitting 5A-5Dincludes a neck portion 37A, D for receiving the fluid delivery tube4A-4D, a head portion 29A, D a shoulder 26A, D and a plug 25A, D forinsertion (see also FIG. 7). For example, a central axis of the neckportion 37A may have an angle with respect to a central axis of the plug25D of between approximately 60° and approximately 120° or ofapproximately 90°, wherein the inner channel 11 extends through the neckportion 37D and the plug 25D. Each fluid interconnect fitting 5A-5Dconnects to the corresponding seal feature 7A-7D. In an example, an endof the fluid interconnect fitting 5A-5D, for example the plug 25D (FIG.7), extends within the seal feature 7A-7D. In an example, the sealfeature 7A-7D includes an inner friction fit surface for receiving andretaining the fluid interconnect fitting 5A-5D within the seal feature7A-7D. In an example, the seal feature 7A-7D includes elastomericmaterial. For example, the seal feature 7A-7D extends within the fluidinlet 8A-8D. For example, the seal feature 7A-7D extends in the fluidinlet at an end thereof, or substantially completely. In an example, theouter surface of the seal feature 7A-7D includes a friction surface forretaining the seal feature 7A-7D in the fluid inlet 8A-8D (FIG. 5). Forexample, the plug 25D extending in the seal feature 7A-7D may strengthenthe friction fit by elastically deforming the seal feature 7A-7D so thatthe seal feature 7A-7D presses against the inner walls of the inlet8A-8D. The fluid coupling 1 includes retainers 6A-6D for retaining thefluid interconnect fittings 5A-5D and the seal features 7A-7D withrespect to the supplies 2A-2D.

Note that for reasons of illustration in FIG. 7 sub-features of only onefluid interconnect fitting 5D, retainer 6D and seal feature 7D areindicated, but it will be appreciated that the other fluid interconnectfittings 5A-5C, retainers 6A-6C and seal features 7A-7C can have equalsub-features. In the examples of FIGS. 6 and 7, each fluid interconnectfitting 5A-5D includes a plug 25D at one end for insertion in areceiving opening 31D of the corresponding seal feature 7A-7D. Thereceiving opening 31D is arranged to receive the plug 25D. The receivingopening 31D is arranged to elastically expand when the plug 25D isinserted, so that the seal feature 7A-7D is tensioned and seals andretains the plug 25D in the fluid inlet 8A-8D. For example the surfaceof the receiving opening 31D is arranged to provide for a frictionbetween the wall of the receiving opening 31D and the plug 25D. In anexample, the fluid interconnect fitting 5A-5D includes a shoulder 26Dthat in assembled condition is engaged by the retainer 6A-6D. In anexample, the shoulder 26D is engaged by a support surface 27D of theretainer 6A-6D. In an example, the shoulder 26D includes a flange orring portion protruding from a head portion 29D of the fluidinterconnect fitting 5A-5D. In an example, the shoulder 26D includes twoopposite shoulder portions. In an example, the plug 25D protrudes fromthe shoulder 26D. In the illustrated example, the support surface 27D isdefined by a top surface of the retainer 6A-6D having an opening 30D forreceiving a head portion 29D of the fitting 5A-5D. In assembledcondition, the head portion 29D of the fluid interconnect fitting 5A-5Dextends through the opening 30D in the support surface 27D and thesupport surface 27D presses onto the shoulder 26D, thereby pressing theplug 25D in the receiving opening 31D of the seal feature 7A-7D, andthereby pressing and retaining both the plug 25D and the seal feature7A-7D with respect to the inlet 8A-8D. In an example, as shown in FIG.7, the head portion 29D includes a second shoulder 66D just above theshoulder 26D. For example, in installed condition, the support surface27D of the retainer 6A-6D is held by the head portion 29D between theshoulder 26D and the second shoulder 66D. A thin slot is providedbetween the second shoulder 66D and the shoulder 26D for receiving thesupport surface 27D. Both shoulders 26D, 66D may provide for a certainfriction on the support surface 27D for retaining the retainer 6A-6D inposition with respect to the fluid interconnect fitting 5A-5D beforeclipping the fitting-retainer assembly to the fluid inlet 8A-8D. Thereceiving opening 31D extends between the shoulder 26D and the secondshoulder 66D, around a portion of the head portion 29D that is thinnerthan the shoulders 26D, 66D.

In an example, the retainer 6A-6D includes at least one wing 35D. In anexample, the retainer 6A-6D includes at least one retainer notch 32D,for engaging a counterpart notch 33D of the corresponding supply 2A-2D(FIGS. 5,6, 7). In the illustrated example, the retainer notches 32D areprovided in the wings 35D. For example, the retainer notches 32D includea hole or indent for hooking or clasping the retainer 6A-6D to thecounterpart notch 33D. In the illustrated example, the fluid inlet 8A-8Dis defined by a fluid inlet cylinder 34D.

In an example, the fluid inlet cylinder 34D and counterpart notch 33Dare part of a single cast that includes a shell portion of the supply.In another example (not illustrated), the fluid inlet cylinder 34D isseparately attached to the fluid supply 2A-2D. In again another example(not illustrated), the fluid inlet 8A-8D is defined by a hole drilled inthe top surface of the fluid supply 2A-2D, so as to provide for theinlet opening and receive the seal feature 7A-7D.

The illustrated fluid inlet cylinder 34D is provided with one or more ofsaid counterpart notches 33D (FIG. 5). In the illustrated examples, thecounterpart notch 33D includes a ramp. In assembled condition, the fluidinlet cylinder 34D receives the seal feature 7A-7D. For example, theseal feature 7A-7D is friction fitted in the fluid inlet 8A-8D (FIG. 5).For example, the seal feature 7A-7D is arranged to be elasticallydeformed when inserted in the fluid inlet 8A-8D so as to press againstinner walls of the fluid inlet cylinder 34D and retain its position andseal the fluid inlet 8A-8D. In assembled condition, the shoulder 26Dpresses onto the seal feature 7A-7D, aided by the retainer 6A-6D. Inassembled condition, the support surface 30D of the retainer 6A-6Dpresses on the shoulder 26D. In assembled condition, the counterpartnotch 33D retains the retainer notch 32D so that the fluid interconnectfitting 5A-5D and seal feature 7A-7D are retained with respect to thefluid inlet 8A-8B. The fluid interconnect fitting 5A-5D, retainer 6A-6Dand seal feature 7A-7D can be readily plugged in, and clipped to, thefluid supply 2A-2D by man or machine, thereby establishing a reliablefluid coupling 1.

For example, the retainer 6A-6D is defined by a dip-like arrangement(FIG. 7). For example, the retainer 6A-6D includes two, three or fourwings 35D extending at an approximately straight angle from the supportsurface 27D. For example, the wings 35D are arranged to be resilient soas to bend outwards when being pushed with sufficient force over theramp of the counterpart notch 33D and bends inwards when an edge of theretainer notch 32D passes over the end of the ramp of the counterpartnotch 33D. Hence, the edge of the retainer notch 32D is retained by thecounterpart notch 33D. For example, these actions can be referred as“clipping”. In this way, the fluid interconnect fitting 5A-5D, theretainer 6A-6D and the seal feature 7A-7D can be inserted in, and lockedto, the fluid inlet 8A-8D in one movement.

As illustrated in FIG. 7, in an example the seal feature 7A-7D includesa seal disc 38D for engagement with the support surface 27D of theretainer 6A-6D. The seal disc 38D includes the receiving opening 31D forreceiving the plug 25D. For example, the seal feature 7A-7D includes alongitudinally shaped cylindrical seal portion 39D protruding from theseal disc 38D that in assembled condition extends within the fluid inletcylinder 34D. For example, the cylindrical seal portion 39D includesring shaped seal portions 49D that provide for extra friction ascompared to the neighboring portions of the seal feature 7A-7D, and/orhave increased stiffness with respect to neighboring portions of theseal feature 7A-7D. For example, one ring-shaped seal portion 49D isarranged near the disc 38D. For example, a second ring-shaped sealportion 59D is arranged near an end of the cylindrical seal portion 39Dfor further safeguarding of seal and friction properties of the sealfeature 7A-7D.

As illustrated in the examples of FIGS. 4-7, the retainer 6A-6D andfluid interconnect fitting 5A-5D are arranged so that a rotationalorientation of the fluid interconnect fitting 5A-5D with respect to thefluid inlet 8A-8D is predefined. For example, the fluid interconnectfitting 5A-5D has a predefined and fixed rotational orientation withrespect to the supply 2A-2D in assembled condition. For example, therotational orientation of an engagement surface 36D of the shoulder 26Dwith respect to the neck portion 37D determines the rotationalorientation of the neck portion 37D with respect to the fluid inlet8A-8D. For example, as can be seen from FIG. 4, the neck portions 37Dare oriented to facilitate a convenient orientation of the fluiddelivery tubes 4A-4B, close to the fluid interconnect fitting 5A-5D. Forexample, the engagement surface 36D of the shoulder 26D is defined by arectangular or straight edge feature that predefines the rotationalorientation of the fluid interconnect fitting 5A-5D in the fluid inlet8A-8D. The engagement surface 36D is arranged to engage one of the wings35D of the retainer 6A-6D. The engagement surface 36D engages the wing35D so that the engagement surface 36D in engaged condition is impededfrom rotating with respect to the retainer 6A-6D. The engagement surface36D has a predefined orientation with respect to the neck portion 37D todefine the orientation of the neck portion 37D with respect to the fluidinlet 8A-8D. For example, a tangential of the engagement surface 36D hasa non-straight angle and is not parallel to a central axis of the neckportion 37D so that also the central axis of the neck portion 37D doesnot have a parallel orientation and no straight angle with respect to aside wall of the supply 2A-2D. For example, the predefined rotationalorientation is chosen according to a convenient placement of the fluiddelivery tubes 4A-4D.

FIGS. 8-10 illustrate examples of multiple views onto the tube tray 20.The tube tray 20 is arranged to be mounted onto the supplies 2A-2B. Forexample the tube tray 20 includes at least one alignment feature 40, 41for aligning the tube tray 20 with respect to the supplies 2A-2B. Forexample, the at least one alignment feature 40,41 includes at least oneside wall 40 that protrudes downwards from a bottom plane 42 of the tubetray 20. The at least one side wall 40 is arranged to engage a side wall43 of one of the side supplies 2A, 2D. For example, the at least onealignment feature 40, 41 includes a back wall 41 that protrudesdownwards from the bottom plate 42. For example, further alignmentfeatures 40, 41 include protrusions 41A, 41B included in the bottomplate 42 or one of the side or back walls 40, 41. For example, the backwall 41 includes at least one alignment rib 41A and at least onealignment notch 41B for better alignment of the tray 20 with respect tothe supplies 2A-2D. The back wall 41 is arranged to engage the backsurfaces 44A-44D of the fluid supplies 2A-2D. The back wall 41 and sidewall 40 of the tube tray 20 can be used to align the tube tray 20 withrespect to the supplies 2A-2D.

For example, the tube tray 20 includes at least one key feature and/orguide(s) 45A-45D (FIGS. 9, 10). For example, the supplies 2A-2D includeat least one corresponding supply key feature 46A-46D. In theillustrated example, the tube tray key feature 45A-45D is arranged tocommunicate with at least one corresponding supply key feature 46A-46Don the supply 2A-2D for example to prevent that incorrect supplies 2A-2Dare connected to the tube tray 20, or to prevent incorrect positioningof the tube tray 20 with respect to each of the supplies 2A-2D. In theillustrated example, the supply key features 46A-46D include indents inrespective supply top surfaces. For example, the tube tray key features45A-45D include protrusions for at least partial insertion in therespective indents. In the illustrated example, each supply 2A-2Dincludes equal supply key features 46A-46D.

In another example (not illustrated) each supply key features 46-46D hasa position that is specific for the color in the supply 2A-2D, wherein adifferent color in the supply 2A-2D corresponds to a different positionof the supply key feature 46A-46D, wherein also each tube tray keyfeature 45A-45D has a specific position defined by the correspondingsupply key feature position. In such example, the respective keyfeatures 45A-45D, 46A-46D enable that the positions of each specificcolor supply 2A-2D with respect to the tube tray 20 are predefined.

The key features 45A-45D, 46A-46D may prevent improper positioning ofthe supplies 2A-2D with respect to the tube tray 20, or prevent thatwrong supplies 2A-2D are connected to the tube tray 20. For example, itmay be prevented that a fluid interconnect fitting 5A-5D is connected toa non-corresponding color supply 2A-2D or a non-authentic supply 2A-2D.

FIGS. 11 and 12 illustrate an example of an assembly of the tube tray 20and the supplies 2A-2D. In the example, the tube tray 20 includes afirst locking feature. In the example, the first locking featureincludes a slot 46 in the side wall 40. For example, the first lockingfeature includes a second slot 47 in an opposite side wall 48 of thetube tray 20. For example, the fluid supplies 2A-2D include a secondlocking feature. For example, the second locking feature includes a slot51A-51D in the fluid supply 2A-2D, near the top surface of the fluidsupply 2A-2D. For example, the slot 51A-51D is defined by a throughhole. FIGS. 8 and 9 provide a clear view on example fluid supply slots51A-51D. For example, the fluid supply slots 51A-51D are arranged inline with the tube tray slots 46, 47. For example, a second retainerfeature is provided. For example, the second retainer feature includes abar 53. For example, the second retainer feature is arranged to engagethe first and second locking feature for retaining the tube tray 20 withrespect to the fluid supplies 2A-2D. For example, the bar 53 is arrangedto slide through the supply and tube tray slots 51A-51D, 46, 47 so as toretain the tube tray 20 with respect to the supplies 2A-2D. For example,the bar 53 retains portions of the side walls 47, 48. For example,opposite ends of the bar 53 engage the opposite side walls 47, 48 of thetube tray 20. For example, the bar 53 includes a stop 55 at one end. Forexample, a clip 56 is provided at an opposite end of the bar 53 withrespect to the stop 55. For example, the opposite end of the bar 53includes a protrusion 57 for attaching the clip 56. For example, the dip56 includes a pin, ring or hook. For example, the clip 56 is arranged tobe attached to the opposite end of the bar 53 for locking the bar 53with respect to the tube tray 20 and the supplies 2A-2D. For example,the stop 55 and the clip 56 prevent that the bar 53 slides out of theslots 51A-51D, 46, 47. During assembly, the bar 53 is pushed through thefirst and second locking features 51A-51D, 46, 47 until the stop 55engages the side wall of the supplies 2A-2D. Then the clip 56 isattached to the bar 53 for locking the bar 53, and therewith the tubetray 20, in place.

FIG. 13 illustrates a flow chart of a method of establishing a fluidicconnection between a fluid supply 2A-2D and a fluid delivery tube 4A-4D.For example, the fluid delivery tube 4A-4D is connected to at least onefluid reservoir 3. For example, the method includes connecting a sealfeature 7, 7A-7D to an inlet 8, 8A-8D of the fluid supply 2,2A-2D (block100). For example, the method includes connecting the fluid interconnectfitting 5, 5A-5D to the seal feature 7, 7A-7D (block 110). For example,the method includes connecting a retainer 6, 6A-6D so that the retainer6, 6A-6D retains the fluid interconnect fitting 5, 5A-5D with respect tothe seal feature 7, 7A-7D and the fluid supply 2, 2A-2D (block 120). Forexample, the retainer 6, 6A-6D includes a clip for clipping to the fluidinterconnect fitting 5, 5A-5D and the fluid inlet 8, 8A-8D. For example,the method includes fluid flowing through the fluid delivery tubes 4,4A-4D (block 130), for example out of a connected reservoir 3. Forexample, the method includes fluid flowing from the fluid delivery tubes4, 4A-4D through the fluid interconnect fitting 5, 5A-5D (block 140).For example, the fluid flows through the fluid interconnect fitting 5,5A-5D, changing a fluid flow direction F between approximately 60° andapproximately 120°, or approximately 90° in the inner channel 11. Forexample, the method includes the fluid flowing through the seal feature7, 7A-7D and into the supply 2A-2D (block 150). In a further example,the method of FIG. 13 is described in a set of instructions 12 forallowing the method to be executed by man or machine.

FIG. 14 illustrates a flow chart of a further example of a method ofestablishing a fluidic connection. For example, the method concerns afluidic connection between the at least one reservoir 3 and the supplies2, 2A-2D. For example, the method includes pressing the fluidinterconnect fitting 5, 5A-5D into the seal feature 7, 7A-7D (block200). For example, the fluid interconnect fitting 5, 5A-5D expands theseal feature 7, 7A-7D and/or a friction fit is established between thefluid interconnect fitting 5, 5A-5D and the seal feature 7, 7A-7D. Forexample, the method includes inserting the seal feature 7, 7A-7B in thefluid inlet 8A-8D (block 210). For example, an at least partialdeformation of the seal feature 7, 7A-7D and/or a friction fit canprovide for better seal properties. For example, the method includespressing the retainer's support surface 27D onto the shoulder 26D (block220) of the fluid interconnect fitting 5, 5A-5D. For example, the methodincludes pressing the retainer 6, 6A-6D further towards the fluid inlet8, 8D-8D so that the retainer wings 35D bend outwards, over thecounterpart notch's ramp, until the retainer notch 32D snaps intoengagement with the counterpart notch 33D, for locking the fluidinterconnect fitting 5, 5A-5D to the fluid inlet 8, 8A-8D (block 230).In this way, the fluidic interconnection between the reservoir 3 and thesupplies 2, 2A-2D may be established. For example, fluid starts flowingfrom the reservoir 3, through the fluid delivery tubes 4, 4A-4D, throughthe fluid interconnect fitting 5, 5A-5D and the seal feature 7,7A-7Dinto the fluid inlet 8, 8A-8D and the supply 2, 2D-2D (block 240). Forexample, the fluid flows from the supply 2, 2A-2D to a fluid dispensinghead 15 for fluid ejection.

FIG. 15 illustrates a flow chart of a further example of a method ofestablishing a fluidic connection. For example, the method includes theretainer 6, 6A-6D engaging the fluid interconnect fitting 5, 5A-5D in apredefined rotational orientation (block 300). For example, therotational orientation is predefined by the relative positions of theneck portion 37D and the engagement surface 36D, and the retainer wing35D. For example, the method includes the retainer 6, 6A-6D engaging thefluid supply 2, 2A-2D in a predefined rotational orientation (block310). For example, the relative positions of retainer notch 32D and thecounterpart notch 33D determine the orientation of the retainer 6, 6A-6Dwith respect to the fluid supply 2, 2A-2D. For example, the methodresults in the fluid interconnect fitting 5, 5A-5D having a predefinedorientation with respect to the supply 2, 2D-2D (block 320). Forexample, the neck portion 37D is oriented to allow convenient placementof the fluid delivery tubes 4A-4D.

FIG. 16 shows a flow chart of a further example of a method ofestablishing a fluidic connection. The example method includes mountingfluid delivery tubes 4A-4D onto the tube tray 20 (block 400). Forexample the fluid delivery tubes 4A-4D are clipped under the retainingfingers 21. The example method includes mounting the tube tray 20 on topof the supplies 2A-2D (block 410). For example the tube tray 20 isaligned with respect to the supplies 2A-2D with the aid of alignmentwalls 40, 41 and keyed with respect to the supplies 2A-2D with the aidof key features 45A-45D, 46A-46D. The example method includes the secondretainer feature engaging the tube tray 20 and the fluid supplies 2A-2Dfor retaining the tube tray 20 with respect to the fluid supplies 2A-2D(block 420). For example, the bar 53 is slit through the slots 46, 47,51A-51D of the tube tray 20 and the supplies 2A-2D. For example, theexample method of FIG. 16 may be executed before any of the examplemethods of FIGS. 13-15.

For example, the disclosed examples of fluid couplings 1 can be appliedin print systems 100. For example, the disclosed examples can be used ina continuous ink supply system or in a lifetime supply printer. Forexample, the disclosed examples can be used in other fluid dispensingsystems including but not limited to pharmaceutical applications,titration devices, fluid sampling devices, etc.

The above description is not intended to be exhaustive or to limit thisdisclosure to the examples disclosed. Other variations to the disclosedexamples can be understood and effected by those of ordinary skill inthe art from a study of the drawings, the disclosure, and the claims.The indefinite article “a” or “an” does not exclude a plurality, while areference to a certain number of elements does not exclude thepossibility of having more or less elements. A single unit may fulfilthe functions of several items recited in the disclosure, and vice versaseveral items may fulfil the function of one unit. Multiplealternatives, equivalents, variations and combinations may be madewithout departing from the scope of this disclosure.

Example fluid couplings, systems and methods are described including afluid delivery tube for delivering fluid to a fluid supply, a fluidinterconnect fitting for connection to the fluid delivery tube, aretainer for engaging the fluid interconnect fitting and a fluid supplyfor retaining the fluid interconnect fitting with respect to the fluidsupply, and a seal feature arranged to mate with the fluid interconnectfitting and a fluid inlet of the fluid supply.

An example fluid coupling includes a fluid delivery tube for deliveringfluid to a fluid supply, a fluid interconnect fitting connected thefluid delivery tube, arranged to fluidically connect the fluid deliverytube to the corresponding fluid supply, a retainer arranged to engagethe fluid interconnect fitting and the fluid supply for retaining thefluid interconnect fitting with respect to the fluid supply, and to aseal feature arranged to mate with the fluid interconnect fitting andhaving an outer surface that is arranged to be received in a fluid inletof a fluid supply.

In some examples, the fluid interconnect fitting including is an innerchannel that is arranged to redirect a fluid flow direction between 60and 120 degrees. In some examples, the seal feature includes an innerfriction fit surface for inserting the fluid interconnect fitting at oneend, and an outer friction fit surface to be inserted into the fluidsupply. In some examples, the fluid interconnect fitting includes ashoulder, the retainer includes a support surface for engaging theshoulder, and the retainer includes at least one retainer notch forengaging a counterpart notch of the fluid supply for clipping theretainer to the fluid supply.

In some examples, the retainer and the corresponding fluid interconnectfitting are arranged to have a predefined rotational orientation withrespect to each other, in assembled condition. In some examples, a tubetray arranged to guide multiple fluid delivery tubes, redirect the fluiddelivery tubes over an angle of at least approximately 90°, and bemounted on top of multiple fluid supplies. In some examples, the tubetray includes a first locking feature, at least one of the fluidsupplies includes a second locking feature, and a second retainerfeature is provided that is arranged to engage the first and secondlocking feature for retaining the tube tray with respect to the fluidsupplies.

In some examples, the tube tray includes at least one alignment featurefor aligning the tube tray with respect to the supplies, and at leastone key feature that is arranged to communicate with a correspondingsupply key feature of a supply for properly connecting the tube traywith the supply, and provide for improper positioning when it isconnected with a different supply than said supply with saidcorresponding supply key feature. In some examples, a fluid inletcylinder is arranged to be located on or near a top surface of the fluidsupply, provide for an inlet opening in the fluid supply, receive therespective seal feature, and allow the retainer to engage the fluidinlet cylinder to retain the fluid interconnect fitting and the sealfeature with respect to the cylinder. In some examples, the fluid inletcylinder including at least one counterpart notch arranged to engage afirst retainer notch in a predefined rotational orientation of theretainer with respect to the fluid inlet cylinder.

An example print system includes a fluid coupling, including: a fluiddelivery tube for delivering fluid to a fluid supply, a fluidinterconnect fitting connected the fluid delivery tube, arranged tofluidically connect the fluid delivery tube to the corresponding fluidsupply, a retainer arranged to engage the fluid interconnect fitting andthe fluid supply for retaining the fluid interconnect fitting withrespect to the fluid supply, and a seal feature arranged to mate withthe fluid interconnect fitting and having an outer surface that isarranged to be received in a fluid inlet of a fluid supply; and a fluidsupply connected to the fluid coupling, the fluid supply including: afluid inlet fluidically connected to the fluid delivery tube, and afluid outlet for fluidic connection to a fluid dispensing head, the sealfeature extends at least partially in the fluid inlet, and the fluidsupply includes a regulator to regulate fluid flow from the fluiddelivery tube to the fluid dispensing head.

An example method of establishing a fluidic connection between a fluidsupply and a fluid delivery tube, includes inserting a seal feature intoan inlet of the fluid supply, connecting a fluid interconnect fitting tothe seal feature, connecting a retainer to the fluid interconnectfitting and the fluid supply to retains the fluid interconnect fittingand seal feature with respect to the fluid supply, and fluid flowingthrough the fluid delivery tube, fluid interconnect fitting and sealfeature, into the fluid supply.

In some examples, pressing the fluid interconnect fitting into thecorresponding seal feature until a friction fit is established betweenthe fitting, seal feature and inlet, placing a retainer support surfaceonto a shoulder of the fluid interconnect fitting, and pressing theretainer towards the fluid inlet until a retainer notch snaps intoengagement with a counterpart notch of the fluid supply for locking thefluid interconnect fitting with respect to the fluid inlet. In someexamples, the method includes mounting the fluid delivery tube in a tubetray, mounting the tube tray on the fluid supply, and a second retainerfeature engaging the tube tray and the fluid supply for retaining thetube tray with respect to the fluid supply.

An example kit of parts for assembling a fluid coupling for connecting afluid reservoir to a fluid supply includes a fluid delivery tube fordelivering fluid from the fluid reservoir to the fluid supply, a fluidinterconnect fitting for connection to the fluid delivery tube, arrangedto fluidically connect the fluid delivery tube to the fluid supply, aretainer arranged to engage the fluid interconnect fitting and the fluidsupply for retaining the fluid interconnect fitting with respect to thefluid supply, and a seal feature arranged to mate with the fluidinterconnect fitting and having an outer surface that is arranged to bereceived in a fluid inlet of a fluid supply.

An example fluid coupling includes a fluid delivery tube for deliveringfluid to a fluid supply, a fluid interconnect fitting connected to thefluid delivery tube, arranged to fluidically connect the fluid deliverytube to the fluid supply, a retainer arranged to engage the fluidinterconnect fitting and the fluid supply for retaining the fluidinterconnect fitting with respect to the fluid supply, a seal featurearranged to mate with the fluid interconnect fitting and having an outersurface that is arranged to be received in a fluid inlet of a fluidsupply, and a tube tray arranged to guide multiple fluid delivery tubes,redirect the fluid delivery tubes over an angle of at leastapproximately 90°, and be mounted on top of multiple fluid supplies.

In some examples, the fluid interconnect fitting including an innerchannel that is arranged to redirect a fluid flow direction between 60and 120 degrees. In some examples, the seal feature including an innerfriction fit surface for inserting the fluid interconnect fitting at oneend, and an outer friction fit surface to be inserted into the fluidsupply. In some examples, the fluid interconnect fitting including ashoulder, the retainer includes a support surface for engaging theshoulder, and the retainer includes at least one retainer notch forengaging a counterpart notch of the fluid supply for clipping theretainer to the fluid supply. In some examples, the retainer and thefluid interconnect fitting are arranged to have a predefined rotationalorientation with respect to each other, in assembled condition. In someexamples, the tube tray includes a first locking feature, at least oneof the fluid supplies includes a second locking feature, and a secondretainer feature is provided that is arranged to engage the first andsecond locking feature for retaining the tube tray with respect to thefluid supplies.

In some examples, the tube tray includes at least one alignment featurefor aligning the tube tray with respect to the supplies, and at leastone key feature that is arranged to communicate with a correspondingsupply key feature of a supply for properly connecting the tube traywith the supply, and provide for improper positioning when it isconnected with a different supply than said supply with saidcorresponding supply key feature.

In some examples, a fluid inlet cylinder arranged to be located on ornear a top surface of the fluid supply, provide for an inlet opening inthe fluid supply, receive the respective seal feature, and allow theretainer to engage the fluid inlet cylinder to retain the fluidinterconnect fitting and the seal feature with respect to the cylinder.In some examples, the fluid inlet cylinder including at least onecounterpart notch arranged to engage a first retainer notch in apredefined rotational orientation of the retainer with respect to thefluid inlet cylinder.

An example print system includes a fluid coupling as disclosed herein afluid supply connected to the fluid coupling, the fluid supply includinga fluid inlet fluidically connected to the fluid delivery tube, and afluid outlet for fluidic connection to a fluid dispensing head, whereinthe seal feature extends at least partially in the fluid inlet, and thefluid supply includes a regulator to regulate fluid flow from the fluiddelivery tube to the fluid dispensing head.

An example method of establishing a fluidic connection between a fluidsupply and a fluid delivery tube, includes inserting a seal feature intoan inlet of the fluid supply, connecting a fluid interconnect fitting tothe seal feature, connecting a retainer to the fluid interconnectfitting and the fluid supply to retain the fluid interconnect fittingand seal feature with respect to the fluid supply, fluid flowing throughthe fluid delivery tube, fluid interconnect fitting and seal feature,into the fluid supply, mounting the fluid delivery tube in a tube tray,mounting the tube tray on the fluid supply, and a second retainerfeature engaging the tube tray and the fluid supply for retaining thetube tray with respect to the fluid supply.

In some examples, the method includes pressing the fluid interconnectfitting into the seal feature until a friction fit is establishedbetween the fitting, seal feature and inlet, placing a retainer supportsurface onto a shoulder of the fluid interconnect fitting, and pressingthe retainer towards the fluid inlet until a retainer notch snaps intoengagement with a counterpart notch of the fluid supply for locking thefluid interconnect fitting with respect to the fluid inlet.

An example kit of parts for assembling a fluid coupling for connecting afluid reservoir to a fluid supply, including a fluid delivery tube fordelivering fluid from the fluid reservoir to the fluid supply, a fluidinterconnect fitting for connection to the fluid delivery tube, arrangedto fluidically connect the fluid delivery tube to the fluid supply, aretainer arranged to engage the fluid interconnect fitting and the fluidsupply for retaining the fluid interconnect fitting with respect to thefluid supply, a seal feature arranged to mate with the fluidinterconnect fitting and having an outer surface that is arranged to bereceived in a fluid inlet of a fluid supply, and a tube tray arranged toguide multiple fluid delivery tubes, redirect the fluid delivery tubesover an angle of at least approximately 90°, and be mounted on top ofmultiple fluid supplies.

An example printer includes a housing; and a fluid reservoir permanentlyfixed within the housing, the fluid reservoir having a capacitysufficient to store enough ink to print a number of pages thatcorresponds to an expected useful life of the printer. In some examples,the printer includes a printhead to image a substrate, the printhead toreceive ink from the fluid reservoir. In some examples, the printerincludes a regulator to regulate a flow of ink between the fluidreservoir and the print head. In some examples, the regulator is coupledto the fluid reservoir via a snap-fit connection. In some examples, theregulator includes a slot and a nipple including a radial projection, tocouple the regulator and the fluid reservoir, the slot to receive an armof a connector and the radial projection to be received in an apertureof the connector.

In some examples, the printer includes a tube to couple the fluidreservoir and the regulator, the tube to be disposed in a channel toguide the tube from the regulator toward the fluid reservoir. In someexamples, the printer includes a tray including the channel, the trayincluding a retainer extending into the channel to retain the tubewithin the channel. In some examples, the tray defines a first apertureand the regulator defines a second aperture, to couple the tray and theregulator, the first and second apertures to be aligned and a lock toextend through the first and second apertures. In some examples, thelock is a bar. In some examples, the regulator includes a firstregulator and a second regulator and the fluid reservoir includes afirst fluid reservoir and a second fluid reservoir, the first fluidreservoir to supply ink to the first regulator during a printingoperation and the second fluid reservoir to supply ink to the secondregulator during the printing operation.

In some examples, the printer includes a guide to encourage the firstfluid reservoir to be in fluid communication with the first regulatorand to encourage the second fluid reservoir to be in fluid communicationwith the second regulator. In some examples, the guide is to deter thefirst fluid reservoir from being in fluid communication with the secondregulator and to deter the second fluid reservoir from being in fluidcommunication with the first regulator. In some examples, the printerincludes a receptacle to receive one of a regulator and an exchangeableink cartridge, the regulator to receive ink from the fluid reservoirwhen the regulator is received within the receptacle.

In some examples, when the ink cartridge is received within thereceptacle, the ink cartridge is not to receive ink from the fluidreservoir. In some examples, the fluid reservoir is an off-axis fluidreservoir.

An example method includes performing a first printing operation usingink from within an exchangeable ink cartridge disposed within areceptacle; removing the ink cartridge from the receptacle; disposing aregulator within the receptacle; coupling the regulator to an off-axisfluid reservoir, the regulator to control a flow of ink between thefluid reservoir and a print head; and performing a second printingoperation using ink from within the off-axis fluid reservoir. In someexamples, the fluid reservoir is permanently fixed within the printer.In some examples, the fluid reservoir has a capacity sufficient to storeenough ink to print a number of pages that corresponds to an expecteduseful life of the printer.

An example printer retrofit assembly includes a regulator; and a fluidreservoir, the regulator to be coupled between the fluid reservoir and aprint head to regulate a flow of ink between the fluid regulator and theprint head, the fluid reservoir having a capacity sufficient to storeenough ink to print a number of pages that corresponds to an expecteduseful life of a printer. In some examples, the regulator is to bedisposed within a receptacle of the printer, the receptacle sized toreceive one of the regulator and an exchangeable ink cartridge.

What is claimed is:
 1. A printer, comprising: a housing; a fluidreservoir permanently fixed within the housing, the fluid reservoirhaving a capacity sufficient to store enough ink to print a number ofpages that corresponds to an expected useful life of the printer; aprinthead to image a substrate, the printhead to receive ink from thefluid reservoir; a regulator to regulate a flow of ink between the fluidreservoir and the print head; a tube to couple the regulator and thefluid reservoir, the tube to be disposed in a channel to guide the tubefrom the regulator toward the fluid reservoir, and a tray including thechannel, the tray including a retainer extending into the channel toretain the tube within the channel.
 2. The printer of claim 1, whereinthe tray defines a first aperture and the regulator defines a secondaperture, the first and second apertures to couple the tray and theregulator, and further including a lock to extend through the first andsecond apertures when the first and second apertures are aligned.
 3. Theprinter of claim 2, wherein the lock is a bar.
 4. The printer of claim1, wherein the regulator includes a first regulator and a secondregulator, the fluid reservoir includes a first fluid reservoir and asecond fluid reservoir, the first fluid reservoir to supply ink to thefirst regulator during a printing operation and the second fluidreservoir to supply ink to the second regulator during the printingoperation.
 5. The printer of claim 4, further including a guide toencourage the first fluid reservoir to be in fluid communication withthe first regulator and to encourage the second fluid reservoir to be influid communication with the second regulator.
 6. The printer of claim5, wherein the guide is to deter the first fluid reservoir from being influid communication with the second regulator and to deter the secondfluid reservoir from being in fluid communication with the firstregulator.
 7. The printer of claim 1, further including a receptacle toreceive one of the regulator and an exchangeable ink cartridge, theregulator to receive ink from the fluid reservoir when the regulator isreceived within the receptacle.
 8. The printer of claim 7, wherein, whenthe ink cartridge is received within the receptacle, the ink cartridgeis not to receive ink from the fluid reservoir.
 9. The printer of claim1, wherein the fluid reservoir is an off-axis fluid reservoir.
 10. Theprinter of claim 1, wherein the regulator is coupled to the fluidreservoir via a snap-fit connection.